End sleeve for strengthening core sleeves for paper rolls



Dc. 2, 1941. B. KlRlLo 2,265,074

END SLEEVE FOR STRENGTHENING CORE SLEEVES FOR PAPER-ROLLS Filed May 2v, 1940 Patented Dec. 2, 1941 vEND SLEEVE Fon STRENGTHENING CORE sLEEvEs Foa PAPER noLLs Boris Kirilo, Warkaus, Finland, assigner to A. Ahlstrm Osakayhti, Warkaus, Finland, a joint-stock company of Finland Application May 27, 1940, Serial No. 337,513 In Sweden January 18, 1939 2 Claims.

The present invention refers in general to the so-called core rollers used in the paper industry, on which rollers the paper is Wound at the mill, to be transported and unrolled at the place for using it. More in detail the invention refers to the end sleeves made of sheet metal that are used for strengthening the ends of the core rollers, which latter at present are mainly made of paper glued together and pressed in many layers, in the shape of a tube that can be applied to the winding and unwinding shafts made in gen eral with the same standardized diameter. These end strengthening sleeves are tted with slots for the keys of the winding or unwinding shaft, these keys preventing the rotation of the core roller and consequently of the unwinding roller in relation to the shaft.

An object of the present invention is to provide a key slot which is strong enough to stand the comparatively heavy strains to which it will be subjected, and that can be made in a cheaper and simpler manner than the key slots of the same kind known up to now.

Some embodiments of the invention have been illustrated on the accompanying drawing, where the same reference characters are used to indicate similar parts.

Fig. 1 shows a perspective partial picture of an end strengthening sleeve provided with a slot according to one form of the invention;

Fig. 2 a similar picture according to another form of the invention;

Fig. 3 a section part of an end sleeve with a wedge groove strengthened in a special way, in perspective;

Fig. 4 yet another form of application of a Wedge groove with strengthening.

The key slot is formed in a known manner, of two outwardly bent ears 3 and 3 cut out from the material of the end sleeve I provided with an outer ange 2 when making it.

In the form according to Fig. 1, the ends of the two ears 3 and 3 have been bent down and welded together with one another, so that a bridge 4 binding the ears together has been formed. If the ears are of suicient length a bridge is obtained with double material thickness when the ends of the ears are bent down over one another. In this form of application of the invention the height of the key slot is preferably made somewhat smaller than the thickness of the material of the core sleeve, so that the outer surface of the latter can be left whole, whereby the layers of paper lying next to the core sleeve cannot be damaged by the key slot, as has been the case up to now. .So as lto fix the end sleeve solidly at the end of the core sleeve, the sleeve material can according to the invention, preferably when stamping out, be provided with a number of short cuts, whereby the material on one side of each cut, is forced into the material of the core roller. In this manner there appear in the jacket of the sleeve, projections 5 with a sharp, braking edge, which in the diierent projections is directed in both directions of rotation.

According to Fig. 2, the strengthening bridge 4 has been cut out in one piece with the ears 3 and 3 preferably so that one half of the bridge is integral with the edge of the one ear directed towards the rear end of the sleeve, the other bridge half towards the corresponding edge of the other ear. The ears 3 having then been bent up inthe usual manner, the bridge halves are bent towards one another and welded together,

` which may take place in one operation with the welding together of the ends of the stamped out sleeve material for making the sleeve. The rectangular opening in front of the bridge 4 in Fig. 2 shows the place where the bridge material has been cut out. The whole length of the bridge may naturally within the scope of the invention be cut out in connection with an ear 3, the free end of the bridge being welded on to the corresponding side edge of the other ear. A double bridge can be obtained by cutting out sufliciently long bridge strips in connection with the two ears. According to Fig. 2 the ends of the two ears 3 and 3 have been bent out to each its side, so as to be pressed, in a manner already known, into the material of the core roller.

To make the bridge shown in Figs. 1 and 2 in the form of a separate piece welded to the ears, must naturally be considered as falling within the scope of the invention, asonly the same effect is obtained thereby. A form of the invention achieved in this manner is shown in Fig. 3, where the bridge 4 is formed by the base of a U- shaped member which has been tted between the two ears 3 and 3, with the legs of the U- shaped member welded to these ears. The U- shaped member may of course also be turned so that the bridge thus formed will correspond to the form shown in Fig. 2. In these forms the thickness of material in the side walls of the key slot is double, which is an advantage, because it is these parts of the key slot that are subjected to the greatest strains. The ends of the ears may also be lengthened as shown on the drawing, and in a well known manner be pressed into the Having now particularly described and ascer tained the nature of my said inventionand inVV what manner the same is to beY performed, I Ide"- Y clare that what I claim is: y Y

1. A sleeve for reinforcing a tubular core of a roll comprising, a cylindrical sheet metal sleeve having peripheral portions cut and bent radially outward from the periphery of 1 the sleeve'to pro# vide ears integral with the sleeve anda key; slot between the ears, radially outer end portions yofV said ears being bent substantially at right angles with the end portions of the ears engaging each other to provide a bridge between radial portions of the ears, and a welded connection between the engaging end portions of the ears.

2. A sleeve for reinforcing a tubular core of a roll comprising, a cylindrical sheet metal sleeve having peripheral portions cut and bent radially outward from the periphery of the sleeve to provide ears integral with the sleeve and a key slot between the ears, radially outer end portions of said ears being bent substantially at right angles with the end portions of the ears engaging each other to provide a bridge between radial portions of the ears, a welded connection between the engaging end portions of the ears, a plate member welded onto an outer face of the radial portion of each ear, and the radial outer end portions of said plate members being bent to extend in oppositecircumferential directions in the plane of the bridge.

BORIS KIRILO. 

